Port of Onsan/Ulsan

The controlling depth at Onsan/Ulsan is 17 meters. Draft restrictions should be confirmed with the port authority before arrival, as silting, dredging operations, and tidal conditions can affect available depths. Pilotage is typically required for larger vessels.

The approach to Onsan/Ulsan is supported by 5 navigation aids within 50 nautical miles. The nearest is Ulsan Sin Hang South Breakwater East End Lighthouse at 0.6 NM to the SE. Other aids include Onsan Hang South Breakwater North Elbow (0.7 NM NNE), Ulju County: Ulsan Sin Hang (New Harbor) Lighthouses (0.7 NM NNE), Onsan Hang North Breakwater (0.9 NM NNE), Onsan Hang South Breakwater East End (0.9 NM ENE). Mariners should consult the relevant chart and List of Lights for full approach details.

The Port of Onsan/Ulsan is located within the Japan / Korea shipping lane — a busy shipping corridor linking the major ports of Japan and South Korea. This strategic position influences vessel traffic density, anchorage availability, and port scheduling.

You can track vessels near Onsan/Ulsan (KRONS) in real time using MarineRadar. The platform displays live AIS positions of nearby ships, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page or search for KRONS on the live map.

The Port of Onsan/Ulsan operates in the UTC+9 time zone. Operating hours, VTS schedules, and pilot availability vary — vessel agents should confirm with the port authority in advance, especially for night arrivals or weekend operations.

ONSAN (UN/Locode: KRONS), South Korea (the Republic of) is a seaport located at approximately 35.43752° N, 129.36330° E.

Coordinates: 35.43752° N, 129.36330° E. Nearby terminals/ports:ULSAN — UN/Locode: KRUSN — 35.51106° N, 129.38280° EMIPO/ULSAN — UN/Locode: KRMIP — 35.52000° N, 129.43000° ESOUTH BUSAN — UN/Locode: KRSBU — 35.08000° N, 129.15000° E

Depths: maximum draft approx. 12 m.

Entrance/operational restrictions — tide: no specific restriction; swell: no specific restriction; ice: none; overhead limits: none and other: none noted.

Communication & port formalities — telephone: not available; radio (VHF): not available; air services: not available; rail: not available; ETA message: not required; quarantine pratique: not available; deratting certificate: not available and first port of entry: not available. Pilotage & towage — pilotage: not available; tug assistance: not available and tug salvage: not available.

Vessel types historically calling: Bulk Carrier, Gas Carrier, General Cargo, Tanker and Tugs Harbor Craft.